Structure of an extendable pull handle for luggage

Abstract

The extendable pull handle for luggage includes several hollow tubes, and the fixed components are placed at the base frame of the hollow tubes of the pull handle. At both sides of hollow tube facing externally, there are separately provided with an upper fixation hole and a lower fixation hole. The component set includes two sets of snapper and a big and small springs; the exterior of first snapper is fitted with the first protruding column, which is protruded and locked onto upper fixation hole of external hollow tube. And, an oblique guide plane is provided at the middle top of first snapper, and a concave surface, at which center and protruded inward is a limit column; the exterior of the second snapper is fitted with a second protruding column, which is protruded and locked onto upper fixation hole of external hollow tube.

1. An expandable pull handle for luggage comprising:
 at least a pair of hollow tubes mounted together in telescopic relation, each of the hollow tubes having an upper fixation hole and a lower fixation hole; 
 a base frame for the hollow tubes, said base frame having an actuating slot; 
 a fixation member positioned in said actuating slot of said base frame, said fixation member suitable for engaging said upper fixation hole so as to lock one of the hollow tubes relative to another of the hollow tubes when the hollow tubes are extended and suitable for engaging said lower fixation hole so as to lock one of the hollow tubes relative to another of the hollow tubes when the hollow tubes are retracted, said fixation member comprising a first snapper and a second snapper and a first spring and a second spring, said first snapper being fitted with a first protruding column, said first protruding column extending so as to lock with said upper fixation hole, said first snapper having an oblique guide plane at a top thereof, said fist snapper having a concave surface and a limit column protruding inwardly at a center of said concave surface, said limit column being of a T-shaped cylinder, said second snapper having a second protruding column extending so as to lock with said upper fixation hole, said second snapper having a guide slide plate on an inner end thereof, said guide slide plate connected to said actuating slot of said base frame, said guide slide plate having a pointing slot at a center of a top thereof, said pointing slot connected to said limit column of said first snapper, said limit column being slidable in said pointing slot, said first spring positioned on an outside of said limit column of said first snapper, said first spring extending between an internal surface of said first snapper and an external surface of said guide slide plate of said second snapper, said second spring positioned on an exterior of said first spring, said second spring having an external side urging against said internal surface of said first snapper, said second spring having an internal side urging against a limit edge formed inside said actuating slot of said base frame, said oblique guide plane of said first snapper having a through hole extending to a top of said actuating slot, said base frame having a bottom having a convex leg opposite to said through hole, said convex leg having an oblique edge mounted at a bottom thereof, said first snapper slidable toward said second snapper by pushing said oblique edge against said oblique guide plane such that said first protruding column releases from the fixation hole.